Microscope



Nov. 14, 1933. NEUMRTH 1,934,874

MICROSCOPE Filed April 4, 1933 INVENTOR Her/m lleuu'lrfh Y ATTORNEY 4 of the inner tube removed Patented Nov. 14,1933

V TIiM'IoRosooPs V Herman Neuvvirth; New York, Application April. 4, isaai'ser'iaij, Nd." 664,299

The-present invention relates to microscopes and, more particularly, to the mechanical structure rather than the optical portions thereof.

'In certain types ,of microscopes. now on. the

; market for home or pocketuse, pairs of .tele- One of the'objects of the present invention is to provide means for eliminating such lateral rocking movement. 1

Another object is to provide resilient means operative to take up wear and to -eliminate either lateral or longitudinal playin the tubes forming part of a microscope assembly.

Other objects of this invention will-in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features ofconstruction, combinations of elements 5; and arrangement of parts which will be exemplified in the construction hereinafter described and of which the scope of application will be indicated in the following claim.

In the accompanying drawing, in which is 153 0 shown one of the possible illustrative embodiments of this invention, Figure 1 is a side elevational view of microscope constructed. to embody the invention;

- Figure 2 is a fragmentary sectional view taken '35 throughthe tube of the microscope assembly shown in Figure 1; s

' v Figure 3 is a cross sectional vi'ew taken on line 3--3 ofFigureZg- Figure 4 is a fragmentary side elevational view shown in Figures 2. and 3, showing the spring wall construction; and

Figure 5 is a cross sectional view taken on line 5-5 in Figure 4. L Referring to the various figures of the drawing, 10 represents a microscope constructed to embody the invention having afoot or standll. pivotally supporting a stanchion or upright'12 by means of a' pivot joint connection 13 of any conventional type. stanchion 12 may be formed integrally with a platen 14' having a central opening 15 formed therein. I Said platen supports spaced knurled'nuts 16 adapted to-retain suitable spring clips 1'7 of any conventional type in any- 55 position of adjustment for retaining specimen;

' 22 formed on the upper extremity of, shell 22;

from the assembly" ties thereof. 7

glass G. Stanchion 12 also supports, a bifurecated bracket 18 pivotally; mounted by means of a screw '19; 'lhe bifurcatedportion of bracket 18 is provided with openings adapted-to serve as journal'bea'rings fora shaft 50'threaded at'both 6o ends, said shaftsupporting an oscillatable mirror 2 0; Apair offknurled'nuts, 2-1 engage with the threaded extremities of shaft 50 and maintain'the latter and the1rhirror in a desired ad'- justed'po'sition. f j 1 1. 5 The assembly supporting themicroscope lenses is composed; of anexternal tube or shell 22rigidly supported by the stanchion-12 by means of screw 23 and having an external thread 22 formed on the upper end thereof. A screw 24 7o threadedly engages with tube'22 and serves as a male guide as hereinafter indicated. The objective 25 of the microscope is supported on a detachable casing 26 and the latter is demount- 'ably secured to move with a longitudinally extending inner tube 2'7 provided with an elongated slot 28 positioned to register with and adapted to be guided by screw. 24. Tube 27 may include an outwardly protruding abutment shoulder 29.

A tubular portion 2'7 extends above the shoulder 30 29 andsupports an eye piece assembly 30. This latter assembly is composed of a tube 31 slidably engaging with tube portion 27 and supporting a first lens 32and a second lens 33, lens 33 being supported in a separate tubular element 34 inte 35 ,gral with a cap 35 screwed into an internal thread 36 intube 31. Upward and downward movement" of tube 2'7 is efiectedby means of athreaded sleeve or collar coupling 3'7 engaging with thread In order to operatively connect tube 27 to 1 sleeve coupling 37 and, at the same time, correct any tendency of tube 2'7 to move or rock laterally after themoving parts have been subjected to wear, use is made of an expansion split spring ring 39. By reference to figures 2 and 3, it will be seen that the spring ring-fits, for the most part inside tube 27 and'is provided with a pair of extending portions or teats 40 fitting into an appropriate annular recess 41 formed in sleeve 10;

coupling 3' 7. From figure 3 it is seen that sufii- 'ci'ent space 42 is left between the ends of spring ring 39 to permit the insertion and removal of the spring by'fapproximation of thefree extremi- In assembling the telescopic portions. of the microscope, sleeve coupling 37 is first mounted in threaded engagement with threads 22. Tube 27 is then lowered into the interior of shell 22 until shoulder 29 abuts against theupper extremerr surface of the 'oiiter'tiibe 22.

ity of sleeve coupling 3'7. A pair of lateral open-. ings 43 formed in tube 27 will then be found to be in alignment with annular recess or groove 41. It sufiices then to spring together the ,free extremities of ring 39; to lower the latterinto tube 2'7 until teats 40 are in'register with open- The structure and position of spring ring "39 is such as to compensate any tendency toward lateral movement of tube 27 insideshell 22 particularly when, through use, playisdeveloped'at the threaded joint between sleeve coupling -37 and threads 22 By making the, teats 40 sufliciently longto da1-..agairit the "bottom side 41 of the groove a "frictional (intact isprovided which acts in takingili)"any'eiiistinglateral play.

.. v" Iofurther correct "anytendencyoi the lower jfrid or thetub'e 27 toyrock laterally the wall of. s aid tubemay be 'slitted asfat 28- and 28, these being prdmn' ations of the slot 28. 'The "slit 28 mayhave a branch slit 28 which'f0rms thew'all portior'f2'7 adjacent said slot and slits into a springtongue. for frictionally enga'gingthe inner It will thus be seen that there is provided a de vice in which the several objects of this invention are achieved and which is well-adapted to meet the conditions of practical use.

As various posible embodiments might be made of the above invention, and as various changes might be made in the embodiment set forth, it is to be understood that all matter herein 'set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

,In combination with the stand of a microscope, an-externally threaded tube supported on said stand,- a;rotata'ble sleeve coupling threadedly engaging with said tube, said sleeve having an annulargroove formed therein, a second tube slidabl-y mounted inside said threaded tube and having an opening in a lateral wall thereof, said second tube'being providedwith ashoulder positione'd;to abut against' one extremity of said sleeve,

and a springring having a protruding portion formed thereon, said ringbein'g mounted to lie insidesa'id second tube withsaid protrudingpor- 'tion' passing -thro'ugh "the "opening in the lateral wall thereof and extending into'the groove in said sleeve.

HERMAN NEUWIRTH. 

